Four
-1
Section::::Morphology.:Joints.

Insect wing
4926056
Four
Four
-1
Section::::Phylogeny and evolution.

Insect
23366462
four
-1
Section::::Morphology.:Venation.

Insect wing
4926056
four
-1
Section::::Origin, systematics and distribution.:"Apis".

Honey bee
58261
four
-1
Section::::Abstract.
Insect
23366462
4
-1
Section::::Morphology.:Venation.

Insect wing
4926056
4
-1
Section::::Abstract.
Honey bee
58261
4
-1
Section::::Phylogeny and evolution.

Insect
23366462